Experimental Study on Preparation of Sintered Brick from Fine Gold Tailings

Abstract

Abstract: In order to solve the problem of environmental pollution and resource waste caused by the stockpiling of fine gold tailings, sintered bricks were prepared with fine gold tailings as the main raw material by adding bentonite and fly ash. The effects of sintering temperature, holding time and different proportion of materials on the properties of sintered bricks were studied. The results show that the optimal composition is 75% (mass fraction, same as bellow) of tailings, 15% of bentonite and 10% of fly ash. The optimum process conditions are 10% water content, 20 MPa forming pressure, 1 175 ℃ sintering temperature and 50 min holding time. The sintered bricks with compressive strength of 38.71 MPa, flexural strength of 10.54 MPa, volume density of 1.908 g/cm³, water absorption of 3.5% can be prepared by this process.

Key words: sintered brick, gold tailings, moulding, compressive strength, bending strength, water absorption

CLC Number:

TU522.1

DUAN Xuchen, MENG Fantao, WEI Chuncheng, LI Zhanchong, MU Qinglin, LIU Zhekun, WANG Yuliang. Experimental Study on Preparation of Sintered Brick from Fine Gold Tailings[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(8): 2653-2658.

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